The specification covers the requirements for locked-in studs. The method of locking in the stud is by means of a serrated collar and an accessory lockring with matching serrations installed within the parent material to prevent rotation.
This SAE Metric Aerospace Standard (MA) provides minimum design, installation, and removal requirements for MA3520 and MA3521 thin wall inserts and is applicable when specified on engineering drawings or in procurement documents.
This SAE Metric Aerospace Standard (MA) provides minimum design, installation, and removal requirements for MA3520 and MA3521 thin wall inserts and is applicable when specified on engineering drawings or in procurement documents.